Fuel Pump Removal & Replacement - Chevy Colorado & GMC Canyon

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Old 09-29-2005, 02:04 PM   #1 (permalink)
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Default Fuel Pump Removal & Replacement

Has anyone attempted this proceedure? On a regular cab model
is there any way to access the pump, other than dropping the tank.
Since I'm assuming the electric pump resides inside the tank.
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Old 09-29-2005, 04:34 PM   #2 (permalink)
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It is easier to take the bed off of the truck than it is to lower the tank. The bed is only held on by a few bolts. Replaced 2 fuel pumps on my previous chevy silverado, and after the first time lowering the tank, a local mechanic gave me the tip. Made the next one a lot easier and quicker.
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Old 09-29-2005, 07:37 PM   #3 (permalink)
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wow, take the bed off? If youve got a hoist, or a tractor. Find someone with a welder and have a plate made up to fit in your floor jack that will support something long. Sort of like a Tranny jack, but different.
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Old 09-29-2005, 08:14 PM   #4 (permalink)
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Actually two guys can easily lift the bed off of the frame once it is unbolted. The hardest part of the entire procedure is unhooking the wiring harness from the brake lights, unbolting the gas tank filler neck from the bed and the bed from the frame, and removing the tailgate. Which is much easier than wrestling the gas tank loose from underneath, and trying to unhook the fuel lines in such a small cramped position. The bed is suprisingly lighter than it looks. If I ever have to do it on my coly, I won't even think twice which method I'll use. A phone call to some local repair shops in your area will show that most of them will go about it in the same way. That is how I found out about this way, and man was it easier. Anyway, just trying to save you some trouble. Good luck either way.
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Old 10-30-2005, 11:20 PM   #5 (permalink)
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Quick question: Where do you hook up fuel pressure gauge and what adapters do you need? Just in case...
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Old 10-31-2005, 12:10 AM   #6 (permalink)
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Usually it's in line before the fuel line goes to the fuel rail. A lot of companies have it set up where the guage is connected by a tube that measures the pressure without having fuel come into the cab. I'm sure it's got to do with safety, obviously.
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Old 10-31-2005, 09:45 AM   #7 (permalink)
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Thanks! I want to get a "baseline" for what is normal, while the truck is running well. Have 95 S-10 with CPI that will absolutely NOT run if the pressure is 38.0 pounds or less; if it's 39.0 or greater, it runs great! That's a whole 'nuther story however.
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Old 11-02-2005, 08:16 PM   #8 (permalink)
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And the reason for the problems with the CPI system is that the injectors are opened hydraulically, not electrically. I know because when the pressure side of the pump goes it will not run. An old Astro owner.
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